SIST ETS 300 925 E3:2003
(Main)Digital cellular telecommunications system (Phase 2+) (GSM); Voice Group Call Service (VGCS) - Stage 1 (GSM 02.68 version 5.2.1 Release 1996)
- Abstract
SUBJECT In VGCS it is optl to perform authentication at call establishment to speed-up call establishment. Authentic. may be delayed, but has to be performed. Clarification on handling if talking subscriber leaves the VGCS area
- Status
- Published
- Publication Date
- 30-Nov-2003
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Dec-2003
- Due Date
- 01-Dec-2003
- Completion Date
- 01-Dec-2003
- Mandate
- UIC
SIST ETS 300 925 E3:2003 is the Slovenian version of ETS 300 925 Edition 3, an ETSI standard for the GSM Voice Group Call Service (VGCS). It specifies the Stage 1 service description for voice group calls in digital cellular telecommunications systems, from the user and subscriber point of view. In practice, it tells network operators, service providers, dispatchers and service subscribers how a VGCS call is set up, who can take part, and how it interacts with other GSM services.
What does SIST ETS 300 925 E3:2003 specify?
SIST ETS 300 925 E3:2003 specifies the Stage 1 description of VGCS for GSM Phase 2+. It defines the service behavior for half-duplex group speech in a predefined group call area and group ID, including normal operation, exceptional cases and interactions with other GSM services.
The document is organized into eight clauses and one informative annex.
| Annex | What it covers |
|---|---|
| Annex A | Status of Technical Specification GSM 02.68 |
Clause 1 sets the scope and notes that the document is written from the subscriber and user point of view. Clause 2 lists the normative references. Clause 3 gives definitions and abbreviations. Clauses 4 to 8 describe the service, normal operation, exceptional procedures, interactions with other GSM services, and interworking considerations. Annex A gives the status history of GSM 02.68.
What are the key requirements of SIST ETS 300 925 E3:2003?
SIST ETS 300 925 E3:2003 focuses on how VGCS calls are established, who may talk, and how the network manages priority, mobility and service interaction. For implementers, the important point is that the document describes service behavior, not the lower-level radio or MMI details.
Subscription and provisioning - Clause 5.1 says VGCS is provided after prior arrangement with the service provider and that each subscriber is assigned group IDs, with up to 50 group IDs per subscription. In practice, the service must be provisioned in the network before users can place or receive group calls.
Network configuration of a group call - Clause 5.3 says a voice group call is pre-registered in the network with attributes such as group ID, group call area composition, dispatcher identities, and the dispatcher identities that may initiate calls. This matters because the network must know in advance which users and cells belong to each group service.
Call establishment and destination handling - Clause 5.4 says the network automatically initiates the VGCS when a subscriber or dispatcher dials the specified short code or address. Destination subscribers are selected by group ID and location, while dispatchers are addressed individually. This means the call is not set up like an ordinary point-to-point call.
Talker control and access timing - Clause 4 and clause 5.4 say only one service subscriber may talk at a time, while up to five dispatchers may talk simultaneously. Service subscribers request the right to speak and are served first come, first served without queuing. The network also aims to assign the uplink within less than 300 ms after a talk request, so the service behaves like a controlled live group conversation.
Authentication, confidentiality and priority - Clause 4 states that GSM call setup authentication is mandatory, but authentication of the calling subscriber or the talking subscriber may be delayed to speed up call setup. It also says radio-path confidentiality is optional and that priority and pre-emption follow eMLPP in GSM 02.67. In practice, the service can be optimized for fast access while still supporting controlled access and priority handling.
Release, mobility and roaming - Clause 4 and clause 6 say the call may be released by the calling subscriber, a dispatcher or the network, and that a mobile station leaving the group call area leaves the call while the network maintains the overall call. Clause 4 also allows VGCS in roaming using supra-PLMN group IDs. This matters when the service must continue across cell changes or across networks.
Interaction with other GSM services - Clause 7 states how VGCS behaves with CLIP, CLIR, COLP, COLR, CFU, CFB, CFNRy, CFNRc, CW, HOLD, MPTY, CUG, AoC, BAOC, BOIC, BOIC-exHC, BAIC, BIC-Roam, ECT, eMLPP, SMS and ODB. For users and implementers, this section shows which supplementary services apply to service subscribers and which apply mainly to dispatchers.
What terms does SIST ETS 300 925 E3:2003 define?
- Network operator - The entity that provides the network elements and resources needed to execute the VGCS.
- Service provider - The entity that offers VGCS subscriptions; the network operator may also be the service provider.
- Voice group call - A VGCS call initiated by a subscriber, used as a synonym for the service call itself.
- Service subscriber - A mobile subscriber who has subscribed to VGCS.
- Dispatcher - A predefined fixed or mobile user who receives all voice group calls for a certain group ID in a group call area and may initiate them.
- Group call area - A predefined one-cell or multi-cell area in which a particular VGCS call is distributed.
- Group ID - The numerical identifier used to select the intended VGCS group and its associated subscribers.
Who uses SIST ETS 300 925 E3:2003?
SIST ETS 300 925 E3:2003 is used by GSM network operators and service providers who need to define and operate group voice calling. It is also relevant to system engineers who configure group IDs, group call areas, dispatchers and call routing.
Dispatchers and organizations that rely on controlled group speech, such as operational or emergency communications users, use the service behavior described here to understand who can speak, who can listen, and how acknowledgements, priority and roaming work. Quality and compliance teams use it to verify that the network behavior matches the VGCS service model.
Which standards are used with SIST ETS 300 925 E3:2003?
SIST ETS 300 925 E3:2003 cites two normative references:
- GSM 01.04 (ETR 350) - provides the abbreviations and acronyms used in the document.
- GSM 02.67 (ETS 300 924) - defines the Stage 1 description of enhanced Multi-Level Precedence and Pre-emption service (eMLPP), which VGCS uses for priority and pre-emption behavior.
What does the SIST ETS 300 925 E3:2003 document contain?
The document contains the service description, the operational rules for call setup and release, and the interaction rules with other GSM supplementary services. Figure 1 shows the logical concept of VGCS, including group IDs, group call areas and dispatchers.
Clause 5 also includes the subscription option for roaming initiation and the network-related service configuration for a call. Clause 7 gives the detailed service interaction behavior for CLIP, CLIR, COLP, COLR, call forwarding, call waiting, hold, multiparty service, barring, ECT, eMLPP, SMS and ODB. Annex A provides a version history for GSM 02.68.
Get Certified
Connect with accredited certification bodies for this standard
ANCE
Mexican certification and testing association.
Intertek Slovenia
Intertek testing, inspection, and certification services in Slovenia.
LNE (Laboratoire National de Métrologie et d'Essais)
French national laboratory for metrology and testing.
Sponsored listings
Frequently Asked Questions
SIST ETS 300 925 E3:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Digital cellular telecommunications system (Phase 2+) (GSM); Voice Group Call Service (VGCS) - Stage 1 (GSM 02.68 version 5.2.1 Release 1996)". This standard covers: SUBJECT In VGCS it is optl to perform authentication at call establishment to speed-up call establishment. Authentic. may be delayed, but has to be performed. Clarification on handling if talking subscriber leaves the VGCS area
SUBJECT In VGCS it is optl to perform authentication at call establishment to speed-up call establishment. Authentic. may be delayed, but has to be performed. Clarification on handling if talking subscriber leaves the VGCS area
SIST ETS 300 925 E3:2003 is classified under the following ICS (International Classification for Standards) categories: 33.070.50 - Global System for Mobile Communication (GSM). The ICS classification helps identify the subject area and facilitates finding related standards.
SIST ETS 300 925 E3:2003 is associated with the following European legislation: Standardization Mandates: UIC. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST ETS 300 925 E3:2003 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2003
'LJLWDOQLFHOLþQLWHOHNRPXQLNDFLMVNLVLVWHP ID]D ±6WRULWHYJRYRUQHJD
VNXSLQVNHJDNOLFD 9*&6 ±6WRSQMD *60UD]OLþLFDL]GDMD
Digital cellular telecommunications system (Phase 2+) (GSM); Voice Group Call Service
(VGCS) - Stage 1 (GSM 02.68 version 5.2.1 Release 1996)
Ta slovenski standard je istoveten z: ETS 300 925 Edition 3
ICS:
33.070.50 Globalni sistem za mobilno Global System for Mobile
telekomunikacijo (GSM) Communication (GSM)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN ETS 300 925
TELECOMMUNICATION November 1998
STANDARD Third Edition
Source: SMG Reference: RE/SMG-010268QR2
ICS: 33.020
Key words: Digital cellular telecommunications system, Global System for Mobile communications (GSM)
R
GLOBAL SYSTEM FOR
MOBILE COMMUNICATIONS
Digital cellular telecommunications system (Phase 2+);
Voice Group Call Service (VGCS) - Stage 1
(GSM 02.68 version 5.2.1 Release 1996)
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Internet: secretariat@etsi.fr - http://www.etsi.org
Tel.: +33 4 92 94 42 00 - Fax: +33 4 93 65 47 16
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1998. All rights reserved.
Page 2
ETS 300 925 (GSM 02.68 version 5.2.1 Release 1996): November 1998
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Standards Making Support Dept." at the address shown on the title page.
Page 3
ETS 300 925 (GSM 02.68 version 5.2.1 Release 1996): November 1998
Contents
Foreword .5
1 Scope .7
2 Normative references.7
3 Definitions and abbreviations .8
3.1 Definitions .8
3.2 Abbreviations .8
4 Description .9
5 Normal operation with successful outcome.12
5.1 Provision .12
5.2 Withdrawal .12
5.3 Network related service configuration.12
5.4 Normal operation for voice group call establishment.12
5.5 Charging requirements .12
6 Exceptional procedures or unsuccessful outcome.13
7 Interaction with other GSM services.13
7.1 Calling Line Identification Presentation (CLIP) .13
7.2 Calling Line Identification Restriction (CLIR) .13
7.3 Connected Line Identification Presentation (COLP) .13
7.4 Connected Line Identification Restriction (COLR) .13
7.5 Call Forwarding Unconditional (CFU) .13
7.6 Call Forwarding on mobile subscriber Busy (CFB).13
7.7 Call Forwarding on No Reply (CFNRy).14
7.8 Call Forwarding on mobile subscriber Not Reachable (CFNRc) .14
7.9 Call Waiting (CW).14
7.10 Call Hold (HOLD).14
7.11 Multi-party Service (MPTY).14
7.12 Closed User Group (CUG).14
7.13 Advice of Charge (AoC).14
7.14 Barring of All Outgoing Calls (BAOC) .14
7.15 Barring of Outgoing International Calls (BOIC).14
7.16 Barring of Outgoing International Calls except those to the Home PLMN country
(BOIC-exHC) .15
7.17 Barring of All Incoming Calls (BAIC).15
7.18 Barring of Incoming Calls when Roaming outside the home PLMN country (BIC-Roam).15
7.19 Explicit Call Transfer (ECT) .15
7.20 Enhanced Multi-Level Precedence and Pre-emption service (eMLPP).15
7.21 Short Message Service (SMS).15
7.22 Operator Determined Barring (ODB) .15
8 Interworking considerations.15
Annex A (informative): Status of Technical Specification GSM 02.68 .16
History.17
Page 4
ETS 300 925 (GSM 02.68 version 5.2.1 Release 1996): November 1998
Blank page
Page 5
ETS 300 925 (GSM 02.68 version 5.2.1 Release 1996): November 1998
Foreword
This European Telecommunication Standard (ETS) has been produced by the Special Mobile Group
(SMG) Technical Committee (TC) of the European Telecommunications Standards Institute (ETSI).
This ETS specifies the stage one description of the Voice Group Call Service (VGCS) within the digital
cellular telecommunications system.
The contents of this ETS is subject to continuing work within SMG and may change following formal SMG
approval. Should SMG modify the contents of this ETS, it will be resubmitted for OAP by ETSI with an
identifying change of release date and an increase in version number as follows:
Version 5.x.y
where:
x the second digit is incremented for all other types of changes, i.e. technical enhancements,
corrections, updates, etc.
y the third digit is incremented when editorial only changes have been incorporated in the
specification;
Transposition dates
Date of adoption of this ETS: 27 November 1998
Date of latest announcement of this ETS (doa): 28 February 1999
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 31 August 1999
Date of withdrawal of any conflicting National Standard (dow): 31 August 1999
Page 6
ETS 300 925 (GSM 02.68 version 5.2.1 Release 1996): November 1998
Blank page
Page 7
ETS 300 925 (GSM 02.68 version 5.2.1 Release 1996): November 1998
1 Scope
This European Telecommunication Standard (ETS) specifies the stage one description of the Voice Group
Call Service (VGCS) which allows speech conversation of a predefined group of service subscribers in
half duplex mode on the radio link taking into account multiple mobile service subscribers involved in the
VGCS call per cell.
The VGCS is applicable to all mobile stations in a certain network and area which have the technical
capability and the corresponding subscription, respectively, to participate in a VGCS call.
NOTE: It is not considered as requirement that normal GSM phase 2 mobile stations will be
able to be used for this service.
The service is described from the service subscriber's and user's point of view; in particular:
- the procedure for normal operation with successful outcome;
- the action to be taken in exceptional circumstances;
- the interaction with other GSM services and features.
This ETS does not deal with the Man-Machine Interface (MMI) requirements, but makes reference to the
appropriate Global System for Mobile Communications (GSM) specifications.
This ETS defines a teleservice of the digital cellular telecommunications system GSM. Any interaction with
other services and/or networks not dealt with in clauses 7 or 8 are outside the scope of this ETS.
2 Normative references
This ETS incorporates by dated and undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this ETS only when incorporated in it by the amendment or revision. For undated references, the
latest edition of the publication referred to applies.
[1] GSM 01.04 (ETR 350): "Digital cellular telecommunications system (Phase 2+);
Abbreviations and acronyms".
[2] GSM 02.67 (ETS 300 924): "Digital cellular telecommunications system
(Phase 2+); enhanced Multi-Level Precedence and Pre-emption service
(eMLPP) - Stage 1".
Page 8
ETS 300 925 (GSM 02.68 version 5.2.1 Release 1996): November 1998
3 Definitions and abbreviations
3.1 Definitions
For the purposes of this ETS, the following definitions apply:
network operator: Entity which provides the network operating elements and resources for the execution
of the VGCS.
service provider: Entity which offers the VGCS for subscription. The network operator may be the
service provider.
voice group call: An instance of the VGCS initiated by a subscriber. This term is used synonymously with
the term "VGCS call".
service subscriber: Mobile subscriber which subscribes to the VGCS.
group identification (group ID): A numerical classification. The maximum number of group IDs which
can be defined in one PLMN depends on the maximum number of group call areas defined in this PLMN.
The maximum number of group IDs and group call areas combined is 10 , Service subscriber shall be
provided with one or up to 50 group IDs.
dispatcher: Particular fixed line or mobile users are identified within the network as dispatchers.
Dispatchers shall receive all voice group calls to a certain group ID in a group call area (this shall be done
automatically by the network). In addition they can initiate voice group calls to a group ID in a group call
area.
Dispatchers shall be connected to a voice group call by means of standard links via radio or via an ISDN.
They shall be called by their ISDN or MSISDN number, respectively. When dispatchers initiate voice
group calls, they shall call a particular MSISDN number which is related to a group ID and group call area.
Dispatchers using the GSM network can be located outside of this group call area.
The identities of the dispatchers are exclusively predefined in the network by the service provider. There
will be none or up to five dispatchers involved in a particular voice group call.
destination subscriber: Service subscriber or dispatcher to which the VGCS call is directed.
calling subscriber: Service subscriber or dispatcher which originates the VGCS call.
group call area: Predefined area composed of one or a cluster of cells to which a particular VGCS call is
distributed. The maximum number of group call area IDs which can be defined in one PLMN depends on
the maximum number of group IDs defined in this PLMN. The maximum number of group IDs and group
call areas combined is 10 , The composition of a group call area is predefined in the network by the
service provider. Changing of cell allocation in the network due to operational reasons will need an
adaptation of the group call area definition. The group call area may include more then one MSC area and
cells of more than one PLMN.
group call member: Any service subscriber or dispatcher participating in an on going voice group call.
3.2 Abbreviations
Abbreviations used in this ETS are listed in GSM 01.04.
Page 9
ETS 300 925 (GSM 02.68 version 5.2.1 Release 1996): November 1998
4 Description
The VGCS is defined in the following. Figure 1 gives an explanation of the logical concept of the VGCS.
a) The VGCS enables a calling subscriber to establish a voice group call to destination subscribers
belonging to a predefined group call area and group ID.
NOTE 1: The service is provided by use of half duplex transmission mode.
Applications for voice group call services typically involve multiple group members in a small group
call area, for which the VGCS should provide spectrum efficient solutions.
b) The calling subscriber as well as the destination subscribers may be any service subscriber which
has subscribed to the related group ID or any dispatcher who is entitled to it by his identity which
shall be registered in the network.
c) Destination subscribers are all service subscribers or a group of service subscribers identified by
the called group ID which have their present location in the group call area, and pre-registered
dispatchers. Destination service subscribers shall be notified with the group ID, not by paging the
subscriber individually. Dispatchers shall be called individually with their identity.
Service subscribers may become late destination subscribers when entering the group call area
within 500 ms after reception of the first notification message related to the VGCS call. Service
subscribers which leave the corresponding group call area during an on going VGCS call of which
they are member cease to be destination subscribers.
d) The voice group call shall be established in a group call area which is comprised of one or a cluster
of cells. Group call areas shall be predefined in the network by the service provider, co-ordinated by
the network operator.
In case of a service subscriber initiating a VGCS, the group call area is uniquely identified by the
actual cell in which the service subscriber resides at the moment of VGCS call initialization and by
the group ID they issue.
A dispatcher initiating a VGCS call will be connected to a related predefined group call area. The
entitlement of the dispatcher is checked by the network element responsible for the voice group call
management by verification of the calling identity. Since a dispatcher may be registered to more
than one grou
...